.sima-whatsapp-fab {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 9999px;
    background-color: #15803d;
    color: #fff;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.sima-whatsapp-fab:hover {
    background-color: #166534;
}

.sima-whatsapp-fab:focus-visible {
    outline: 2px solid #86efac;
    outline-offset: 2px;
}

.sima-whatsapp-fab img {
    display: block;
    width: 1.875rem;
    height: 1.875rem;
}